This KIPON Baveyes Lens Mount Adapter for Mamiya 645-Mount Lens to Nikon Z-Mount Camera enables the use of your Mamiya 645-mount lenses on Nikon Z-mount mirrorless cameras. It features a 0.7x crop factor compensation thanks to the optics developed by German specialists IBE Optics. It features a durable metal construction with both brass and aluminum components. This manual adapter does not maintain automatic lens control between the camera and lens; aperture priority or manual shooting modes should be used, as well as stop-down metering for exposure control.